Rotary steam-engine



(No Model.)

L. HOOPER.

ROTARY STEAM ENGINE. I No. 287,379. Patented Oct. 23, 1883..

WITNESSES v ATTORNEYS.

NITED STATES.

PATENT Omen.

'LORENZO D. HOOPER, OF COFFEYVILLE, KANSAS.

RQTARY STEAM-ENGINE.

SPECIFICATION forming part of Letters Patent No. 287,379, dated October 28, 1883,

Application filed March 10, 1881. (N model.)

To all whom it may concern Be it known that I, LORENZO D. HOOPER, of Coffeyville, in the county of Montgomery and State of Kansas, have invented certain new and useful Improvements in Duplex Rotary Steam-Engines, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings and letters of reference marked thereon, in which Figure 1 is a side elevation of my improved duplex rotary steam-engine. Fig. 2 is an end elevation of the same with one of the cylinderheads removed. Fig. 3 is a bottom view of one of the steam-chests, showing the steam space and ports; and Fig. 4 is a detail view of one of the sliding abutments, showing at its upper end an opening for the escape of ex- I haust-steam.

Similar letters indicate like parts in all figures.

My invention relates to' improvements in duplex rotary steam-engines; and it consists in the peculiar construction and arrangement of the parts, as hereinafter more fully set forth, and. pointed outin the claims.

In the accompanying drawings, a represents the bed-plate of the engine, to which are secured near its ends the cylinders I), provided with exhaust-ports 0 c and central orifices, d d, for the passage of a horizontal drivingshaft, 6, provided near its ends with pistons h, each provided with a projection, h, adapted to revolve steam-tight in its cylinder.

The cylinders, steam-chests, and pistons, with their operative mechanism arranged at opposite ends of the driving-shaft e, are precisely similar in construction. So a descrip tion of those parts at one end of the shaft will answer for both.

Each cylinder-head is provided near the circumference. of its recesses with'two slots, 1 e, lying diametrically opposite each other, and each slot lying opposite an exhaust-port a, through which slots pass steam-tight the outer ends of the abutments 7c is, the inner ends of the abutments being provided with pins Z Z, engaging in the cam-grooves m, fast on the drivingshaft, whereby in the revolution of the shaft 6 the abutments are caused to slide back the and forth in the slots 6 1', to allow the passage of the projection h of the piston. As soon as the projection h has passed one of the abutments k, drawn back by the cam groove m,

the abutment is projected immediately into the cylinder by said cam-groove, and the exhaust-steam passes through an opening, it, in the outer end of the abutment, and thence into the exhaust-port c of the cylinder.

9 g are vertical guides secured to the bed plate, and provided with slots to receive and guide the inner ends of the abutments in their sliding movements.

The front face of each cylinder-head is provided with ports lying diametrically opposite reciproeates the slide-valve q, operated by an eccentric, 0 on the end of the shaft 0, designed to connect the power with the machinery it is to operate.

\Vhat I claim as my invention, and desire to secure by Letters Patent, is

1. The combination, with the driving-shaft 6, provided with the cam-grooves m m, of the cylinders I) 6, arranged at opposite ends of the driving-shaft, and provided with the exhaustports 0 c and slots z 2', and the abutments k k, provided with the pins Z Z and the openings t t, substantially as herein shown and described.

2. The combination, with the driving-shaft 6, provided with the pistons h h, having projections h h, and cam-grooves m m, of the cylinders b 1), arranged at opposite ends of the said shaft, and provided with the exhaustports 0 c and slots 13 z, and the abutments k k,

provided with pins H and openings t 15, substantially as herein shown anddeseribed.

3. The combination, with the driving-shaft 6, provided with the eccentrics c 0 and the cylinders b 1), arranged at opposite ends of the said shaft, of the steam-chests 0 o, secured to the cylinder-heads, and provided with the induction-portsp p and the slide-valves q q, substantially as herein shown and described.

abutments k 10, provided with the pins Z l and 10 openings t t, and the steam-chests o o, secured to the cylinder-heads, and provided with the 4. The combination, with the driving-shaft induction-ports p p and slide-valves q q, sub 5 e, provided with the pistons h h, having prostantially as herein shown and described.

jections h h, the eccentrics c 0 and the camgrooves m m, of the cylinders b 12, arranged at Witnesses: opposite ends of the said shaft, and provided 0. I. ERGENBRIGHT, with the exhaust-ports 0 c and slots '5 i, the J. S. HARVEY.

LORENZO D. HOOPER. 

